Improvement in flue-linings



3 Sheets--Sheet1.

G. A. FREEMAN.

FLUE-LINING.

Patented Dec. 7, 1875.

3 Sheets-She et 2.

C. A. FREEMAN.

FLUE-LINING.

Patented Dec. 7,1875.

Ill-Ill Ill H TGUTHOGRAPHER. WASHINGTON. D C

3 Sheetsh-Sheet 3.

C. A. FREEMAN.

FLUE-LINING. v

Patented. Dec. 7,1875.

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-Fig. 5 is a bottom view of the same.

a pipe.

UNITED STATES PATENT QFFIQE.

CHARLES A. FREEMAN, OF NEW CUMBERLAND, WEST VIRGINIA.

IMPROVEMENT m FLUE-LININGS.

Specification forming part of Letters Patent No. 1 70.841, dated December 7, 1875; application filed September 20, 1875. Y

new and useful Improvement in Combined Flue-Lining; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accom-.

panying drawing, forming part of this specification, in which Figure 1 is a sectional View of the die for forming the pipe attached to the clay-cylinder. Fig. 2 is a top perspective View of the die. Fig. 3 is a bottom perspective view of the die, the pipe-rest being removed. Fig. 4 is a sec tional View of a modification of the form of die for producing flue-lining of square section. Figs. 6 and 7 are views of different shapes of my improved flue-lining and ventilating-pipe.

Like letters of reference indicate like parts in each.

My invention relates to the manufacture of flue-linings, ventilating-pipe, sewer-pipe, 850.; and it consists in a die for forming flue-linings having two or more parallel passages, said die composed of a series of cores arranged around a, central core in such a manner that the spaces intervening between the cores sh all correspond to the web or walls of the article to be produced.

To enable others skilled in the art to make and use my invention, I will proceed to describe it more fully.

The die or cylinder-head A is attached to the clay-cylinder B by means of the bolts 1). In the inner part of this cylinder-head is the mold a for forming the outer surface of my improved This mold or form a may be rectangular, as shown in Figs.2 and 3, or it may be round or fluted, and will correspond in form to the outline of the article to be produced. Inside of the form a. I suspend the central core 0, by means of the rod a passing through the core, and fastened by the nut c. Rigidly attached to the core 0 are two or more lugs, 11, which carry the triangular wing'cores D. Upon the other side of the core (3 are the lugs e, to which is attached the side core E. The lower parts of these lugs 01 and e are fluted or corrugated, as at e, and thinned down to an edge for the purpose of causing the fire-clay to reunite more readily after passing the lugs. The faces of themold a, and different cores incline slightly from the top of the die to the bottom, so that the clay, when it passes through the die, is compressed and made more compact. The pipe-rest G is attached to the cylinder-head A by means of the swinging clutches F, which catch on thearms f on the pipe-rest, though it is evident that any suitable device may he used for accomplishing the same result; as, for instance, the clutches may he rigidly attached to the cylinder-head A, and the arms f pivoted to the upper portion of the pipe-rest G, so as to be turned clear of the clutches F by means of the handle f. This pipe-rest G is arranged so that it moves perpendicularly under the cylindcrA, and can be raised and attached thereto or lowered therefrom when necessary. In this pipe-rest G I make the circular or cylindrical recess 9, for forming the projection i on the pipe or flue. The outer surface of said recess 9 is beveled, so as to form the bevel on the projection 11 to enable it to fit more easily into the next adjoining pipe. The inner surface of the bevel is formed by the ring g, which is the same size and form as the lower face of the central core (3. This ring g may either .fit

upon the projection 9 as shown in the draw-- ing, or it may be firmly attached to the rest Gr, forming part of the same. Through the rest G I make small openings, 9 by means of which I am enabled to determine, from the extrusion of the clay, that the recess 9 is filled before the rest is detached from the cylinder-head A.

In Figs. 4 and 5 is represented a modification of the form of the die for producing fluepipe of square section. In it the wing-cores D are attached to and supported by the cylinder-head A by means of the lugs d, and the pipe-rest G is attached to the cylinder-head by means of the clutches F, rigidly attached to the rest G, and catching on the lugs a on the cylinder-head. The uprights H deflect the clay into the openings around the wing-cores D. In Fig. 4 the central core 0 has been lowered below the die, that the form of the die may be more easily seen.

It is evident that both the wing-cores and side core (shown in Fig. 1) could be attached to the cylinder-head in the manner abor e de- The operation of my improved die is as fol-J lows: The pipe-rest Gris attached to the cylinder-head A, and the clay is forced down by the piston in the cylinder until the clay passes through the openings-g The pipe-rest G is then detached from the cylinder -head and gradually lowered, while the clay is forced through the die by the piston in the cylinder, the central core 0 forming the central or smoke passage i in the pipe or flue I, Fig. 6, the side core 6 forming the side or ventilating passage 2', and the wing-cores D forming the passages 6 The web or walls of the article produced correspond tothe spaces intervening between the cores, as will be seen by reference to Fig. 3, so that, whatever bethe shape of thespaces between the cores, such will be the shape of the pipe manufactured.

The recess 9 in the pipe-rest G forms the projection or flange i which fits into thevcorresponding recess in the next pipe. Whenthe pipe is the desired length it is cut off underneath the die, the pipe I carried away, the pipe-rest G again attached to the cylinderhead, and the process continued.

Fig. 6 represents one form of combined smoke, hot-air, and ventilating pipe, the passage i being for smoke, the passage 72 for hot air or ventilation, and the passages i '5 to lighten the weight of the pipe, and make the walls of a-more even thickness, and make the pipe less liable to crack or break from heat, though the passages may be utilized for some other purpose. The projection or flange i is only made upon the central passage, the edges of the rest of the flue being square and fitting close to each other.

Fig. 7 represents the pipe formed in the die shown in Fig. 4 and'5. W

Having thus described my invention, what I claim, and desire to secure by Letters Patent, isr 1. The die for forming flue-pipe, provided with two or more cores, arranged within said die in such a manner that the spaces intervening between the several cores and the die shall correspond to the web or walls of the article to be produced, substantially as described. 2..In a die for forming pipe, the combination of the cylinder-head A, central core, and one or more side or wing cores, substantially as set forth. I

In testimony whereof I, the said CHARLES A. FREEMAN, have hereunto set my hand.

WILLIAM STEWART, WM. TEESDALE. 

